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NOTE: PCM Inputs: • Air Conditioning Controls • Battery Voltage • Battery Temperature Sensor • Brake Switch • Camshaft Position Sensor • Crankshaft Position Sensor • CCD Bus • Engine Coolant Temperature Sensor • Fuel Level Sensor • Ignition Switch • Intake Air Temperature Sensor • Knock Sensor (2.0L only) • Leak Detection Pump • Manifold Absolute Pressure (MAP) Sensor • Oxygen Sensors • Power Steering Pressure Switch • SCI Receive • Speed Control Switches • Throttle Position Sensor • Transmission Park/Neutral Switch (automatic transmission) • Vehicle Speed Sensor NOTE: PCM Outputs: • Air Conditioning Clutch Relay • Auto Shutdown (ASD) Relay • Charging Indicator Lamp • CCD Bus • SCI Transmit • Proportional Purge Solenoid • EGR Solenoid • Fuel Injectors • Fuel Pump Relay • Generator Field • Idle Air Control Motor • Ignition Coils • Malfunction Indicator (Check Engine) Lamp • Radiator Fan Relays • Speed Control Solenoids injector pulse width, idle speed, ignition spark The PCM adjusts injector pulse width (air-fuel ratio) based on the following inputs. • Battery voltage • Coolant temperature • Exhaust gas content (oxygen sensor) • Engine speed (crankshaft position sensor) • Intake air temperature • Manifold absolute pressure • Throttle position lowing inputs. • Coolant temperature • Engine speed (crankshaft position sensor) • Knock sensor • Manifold absolute pressure • Throttle position • Transmission gear selection (park/neutral switch) • Intake air temperature the idle air control motor based on the following • Air conditioning sense • Battery voltage • Battery temperature • Brake switch • Coolant temperature • Engine speed (crankshaft position sensor) • Engine run time • Manifold absolute pressure • Power steering pressure switch • Throttle position • Transmission gear selection (park/neutral switch) • Vehicle distance (speed) are located in the Power Distribution Center (PDC). The camshaft position sensor and crankshaft posi- tion sensor signals are sent to the PCM. If the PCM The PCM contains a voltage converter that changes battery voltage to a regulated 9 volts direct AUTOMATIC SHUTDOWN (ASD) SENSE—PCM DESCRIPTION It is an input to the Powertrain Control Module from the rely in the Power Distribution Center, refer OPERATION The ASD sense circuit informs the PCM when the ASD relay energizes. A 12 volt signal at this input JX FUEL SYSTEM 14 - 25 DESCRIPTION AND OPERATION (Continued) |